new-doc: add some notes

src/doc/new-doc/standards/index.txi

@@ -42,43 +42,71 @@
 
 @node Iteration
 @section Iteration
+
 @node Objects
 @section Objects
+
 @node Structures
 @section Structures
+
 @node Conditions
 @section Conditions
+
 @node Symbols
 @section Symbols
+
 @node Packages
 @section Packages
+
 @node Numbers
 @section Numbers
+@c make-random-state fixnum|array
+@c ext:random-state-array
+@c #$ macro
+
 @node Characters
 @section Characters
+
 @node Conses
 @section Conses
+
 @node Arrays
 @section Arrays
+
 @node Strings
 @section Strings
+
 @node Sequences
 @section Sequences
+
 @node Hash tables
 @section Hash tables
+@c weakness in hash tables
+@c ext:hash-table-content
+@c ext:hash-table-fill
+@c ext:hash-table-weakness
+
 @node Filenames
 @section Filenames
+
 @node Files
 @section Files
+
 @node Streams
 @section Streams
+
 @node Printer
 @section Printer
+
 @node Reader
 @section Reader
+@c #$ - random state
+
 @node System construction
 @section System construction
+
 @node Environment
 @section Environment
+
 @node Glossary
 @section Glossary